Wireless energy transfer with frequency hopping

  • US 8,692,410 B2
  • Filed: 12/31/2009
  • Issued: 04/08/2014
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A wireless energy transfer system comprising:

  • a source, having at least one source magnetic resonator, each resonator having a resonant frequency;

    at least one power and control circuit, coupled to a power source, and configured to energize at least one source magnetic resonator to generate an oscillating magnetic field;

    a device, having at least one device magnetic resonator configured to capture said oscillating magnetic field, each device magnetic resonator having a resonant frequency;

    wherein magnetic energy transferred by the source to the device is converted into electrical energy by one or more device resonators;

    wherein frequency of said oscillating magnetic field of said source is varied in time in a predetermined sequence; and

    wherein the resonant frequency of at least one device magnetic resonator is varied in the same said predetermined sequence as the said oscillating magnetic field.

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